Lua Simple Global Variable Problem

[Arn]

Hi, I'm trying to get a global variable in a strange way. Please take a look and see if you can tell what I need to do. (will +rep)

This is the recipe for the weapon.

--8000
RECIPE_CLERICAL_MACE = 	{
						itemid = 2423,
						mats = {5880},
						count =  {10},
						cost = 300
						}

This is the table/array that I'm using to access the different recipes.

craftingList = 
{
[0] = {id = 8000, name = 'clerical mace', label = 'RECIPE_CLERICAL_MACE'},
[1] = {id = 8001, name = 'jagged sword', label = 'RECIPE_JAGGED_SWORD'},
[2] = {id = 8002, name = 'orcish axe', label = 'RECIPE_ORCISH_AXE'},
[3] = {id = 8003, name = 'spike sword', label = 'RECIPE_SPIKE_SWORD'}
}

Now heres what I'm trying to do.

local var = craftingList[0].label.itemid

It should find that the itemid is 2423. Instead it says the value is nil. I tried stringToVariant assuming that that function converts a string to a variable, but that didn't work. Any suggestions?

-Arn

 

[J.Dre]

{
	[1] = {id = 8000, name = 'clerical mace', label = 'RECIPE_CLERICAL_MACE'},
	[2] = {id = 8001, name = 'jagged sword', label = 'RECIPE_JAGGED_SWORD'},
	[3] = {id = 8002, name = 'orcish axe', label = 'RECIPE_ORCISH_AXE'},
	[4] = {id = 8003, name = 'spike sword', label = 'RECIPE_SPIKE_SWORD'}
}


for i = 1, 4 do
	local varLabel, varName, varId = craftingList[i].label, craftingList[i].name, craftingList[i].id
end

Not tested.

 

[Arn]

Right, but varLabel would just be a variable holding a string that says 'RECIPE_CLERICAL_MACE'. So when I do varLable.itemid then it doesn't know what I'm talking about.

It think I found my solution anyway though. I'm going to restructure the way recipes are stored to make it one global array. See below.

RECIPES = 
{
[0] = {itemid= 5555, mats = {444,3355,4563}, cost = 500}
....
...
}

 

[kokokoko]

I guess you've solved it, but in case you'd be interested in what might have been causing the problem(note that this is just my guess, could be wrong):

I believe the reason it return NIL is because craftingList[0].label would, as you said, return the string 'RECIPE_CLERICAL_MACE', which would not point to the variable with the same name. If this is the case; Does anyone know if(how) it's possible to get the string to point to that variable? I would like to know

 

[Arn]

^ Ditto

 

[Summ]

Either just replace the string with the variable name

[0] = {id = 8000, name = 'clerical mace', label = RECIPE_CLERICAL_MACE}

OR this:

local var = loadstring("return " .. craftingList[0].label)()  

var -- this is the table
var.itemid -- itemid etc

Explanation:
loadstring("return " .. craftingList[0].label) is equal to:

function ()
return RECIPE_CLERICAL_MACE
end

and you add () to call the function and get the return value

Rep

 

[Arn]

Either just replace the string with the variable name

[0] = {id = 8000, name = 'clerical mace', label = RECIPE_CLERICAL_MACE}

OR this:

local var = loadstring("return " .. craftingList[0].label)()  

var -- this is the table
var.itemid -- itemid etc

Explanation:
loadstring("return " .. craftingList[0].label) is equal to:

function ()
return RECIPE_CLERICAL_MACE
end

and you add () to call the function and get the return value

Rep

I love you.

The first part is so obvious (just putting in the variable name). Big derp on my part.

Second part is very interesting and good to know, thank you!

 

[kokokoko]

@up

Agreed!

Thanks Summit